Yoshihiro Iwasa
YOU?
Author Swipe
View article: Uni-traveling-carrier photodiode based on MoS2/GaN van der Waals heterojunction for high-speed visible-light detection
Uni-traveling-carrier photodiode based on MoS2/GaN van der Waals heterojunction for high-speed visible-light detection Open
Uni-traveling-carrier photodiodes (UTC-PDs), which utilize only electrons as the active carriers, have become indispensable in high-speed optoelectronics due to their unique capabilities, such as high saturation power and broad bandwidth. …
View article: Visualizing Molecular-Scale 3D Distributions of Ionic Liquids in Electric Double-Layer Capacitor by 3D Scanning Force Microscopy with Variable Tip/Sample Bias Voltages
Visualizing Molecular-Scale 3D Distributions of Ionic Liquids in Electric Double-Layer Capacitor by 3D Scanning Force Microscopy with Variable Tip/Sample Bias Voltages Open
Atomic force microscopy (AFM) imaging of ionic liquid (IL) distribution in electric double-layer (EDL) devices has been actively explored to understand the origin of their excellent performance. However, this has been impeded by insufficie…
View article: Misfit layered superconductor (PbSe)1.14(NbSe2)3 with possible layer-selective FFLO state
Misfit layered superconductor (PbSe)1.14(NbSe2)3 with possible layer-selective FFLO state Open
Two-dimensional (2D) superconductors are known for their novel emergent phenomena, however, lack of experimental probes beyond resistivity has hindered further exploration of diverse superconducting states. Bulk 2D superconductors, with su…
View article: Research on Quantum Materials and Quantum Technology at RIKEN
Research on Quantum Materials and Quantum Technology at RIKEN Open
RIKEN covers fundamental research on physics, chemistry, biology, life and medical science, information and mathematical science, and engineering. Here, we outline research activities on quantum materials and quantum technology that includ…
View article: Absence of diode effect in chiral type-I superconductor NbGe2
Absence of diode effect in chiral type-I superconductor NbGe2 Open
Symmetry elegantly governs the fundamental properties and derived functionalities of condensed matter. For instance, realizing the superconducting diode effect (SDE) demands breaking space-inversion and time-reversal symmetries simultaneou…
View article: Absence of diode effect in chiral type-I superconductor NbGe2
Absence of diode effect in chiral type-I superconductor NbGe2 Open
Symmetry elegantly governs the fundamental properties and derived functionalities of condensed matter. For instance, realizing the superconducting diode effect (SDE) demands breaking space-inversion and time-reversal symmetries simultaneou…
View article: Quasi-phase-matching enabled by van der Waals stacking
Quasi-phase-matching enabled by van der Waals stacking Open
View article: Superconducting diode effect under time-reversal symmetry
Superconducting diode effect under time-reversal symmetry Open
In noncentrosymmetric superconductors, superconducting and normal conductions can interchange on the basis of the current flow direction. This effect is termed a superconducting diode effect (SDE), which is a focal point of recent research…
View article: Superconducting diode effect under time reversal symmetry
Superconducting diode effect under time reversal symmetry Open
In noncentrosymmetric superconductors, superconducting and normal conductions can interchange based on the current flow direction. This effect is termed a superconducting diode effect (SDE), which is a focal point of recent research. The b…
View article: Band-driven switching of magnetism in a van der Waals magnetic semimetal
Band-driven switching of magnetism in a van der Waals magnetic semimetal Open
Magnetic semimetals form an attractive class of materials because of the nontrivial contributions of itinerant electrons to magnetism. Because of their relatively low–carrier-density nature, a doping level of those materials could be large…
View article: Giant Modulation of the Second Harmonic Generation by Magnetoelectricity in Two‐Dimensional Multiferroic CuCrP<sub>2</sub>S<sub>6</sub>
Giant Modulation of the Second Harmonic Generation by Magnetoelectricity in Two‐Dimensional Multiferroic CuCrP<sub>2</sub>S<sub>6</sub> Open
Multiferroic materials have attracted considerable attention owing to their unique magnetoelectric or magnetooptical properties. The recent discovery of few‐layer van der Waals multiferroic crystals provides a new research direction for co…
View article: Electron-doped magnetic Weyl semimetal LixCo3Sn2S2 by bulk-gating
Electron-doped magnetic Weyl semimetal LixCo3Sn2S2 by bulk-gating Open
Manipulating carrier density through gate effects, both in electrostatic charge storage and electrochemical intercalation mode, offers powerful control over material properties, although commonly restricted to ultra-thin films or van der W…
View article: Valley-dimensionality locking of superconductivity in cubic phosphides
Valley-dimensionality locking of superconductivity in cubic phosphides Open
Two-dimensional superconductivity is primarily realized in atomically thin layers through extreme exfoliation, epitaxial growth, or interfacial gating. Apart from their technical challenges, these approaches lack sufficient control over th…
View article: Single PbS colloidal quantum dot transistor
Single PbS colloidal quantum dot transistor Open
Control and understanding of the carrier transport in colloidal quantum dots (CQDs) is crucial for device applications. However, due to the fluctuations in the size and morphology of CQD arrays, characterizing carrier transport has been ch…
View article: Gate-tunable ferromagnetism in a van der Waals magnetic semimetal
Gate-tunable ferromagnetism in a van der Waals magnetic semimetal Open
Magnetic semimetals form an attractive class of materials because of the non-trivial contributions of itinerant electrons to magnetism. Due to their relatively low-carrier-density nature, a doping level of those materials could be largely …
View article: Single PbS colloidal quantum dot transistors
Single PbS colloidal quantum dot transistors Open
This is the source data of the manuscript "Single PbS colloidal quantum dot transistors"
View article: An Anisotropic van der Waals Dielectric for Symmetry Engineering in Functionalized Heterointerfaces
An Anisotropic van der Waals Dielectric for Symmetry Engineering in Functionalized Heterointerfaces Open
Source data for "An Anisotropic van der Waals Dielectric for Symmetry Engineering in Functionalized Heterointerfaces"
View article: Vortex dynamics in the two-dimensional BCS-BEC crossover
Vortex dynamics in the two-dimensional BCS-BEC crossover Open
View article: Continuous Electrical Manipulation of Magnetic Anisotropy and Spin Flopping in van der Waals Ferromagnetic Devices
Continuous Electrical Manipulation of Magnetic Anisotropy and Spin Flopping in van der Waals Ferromagnetic Devices Open
Controlling the magnetic anisotropy of ferromagnetic materials plays a key role in magnetic switching devices and spintronic applications. Examples of spin-orbit torque devices with different magnetic anisotropy geometries (in-plane or out…
View article: Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film
Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film Open
In intercalated transition metal dichalcogenides (I-TMDC), transition metal intercalation introduces magnetic phases which in some cases induce topological band crossing. However, evidence of the topological properties remains elusive in s…
View article: Vortex dynamics in the two-dimensional BCS-BEC crossover
Vortex dynamics in the two-dimensional BCS-BEC crossover Open
The Bardeen-Cooper-Schrieffer (BCS) condensation and Bose-Einstein condensation (BEC) are the two limiting ground states of paired Fermion systems, and the crossover between these two limits has been a source of excitement for both fields …
View article: Spontaneous spin-valley polarization in NbSe2 at a van der Waals interface
Spontaneous spin-valley polarization in NbSe2 at a van der Waals interface Open
A proximity effect at a van der Waals (vdW) interface enables creation of an emergent quantum electronic ground state. Here we demonstrate that an originally-superconducting two-dimensional (2D) NbSe2 forms a ferromagnetic ground state wit…
View article: Spontaneous-polarization-induced photovoltaic effect in rhombohedrally stacked MoS2
Spontaneous-polarization-induced photovoltaic effect in rhombohedrally stacked MoS2 Open
View article: Magnon-exciton proximity coupling at a van der Waals heterointerface
Magnon-exciton proximity coupling at a van der Waals heterointerface Open
Spin and photonic systems are at the heart of modern information devices and emerging quantum technologies. An interplay between electron-hole pairs (excitons) in semiconductors and collective spin excitations (magnons) in magnetic crystal…
View article: Giant intrinsic rectification and nonlinear Hall effect under time-reversal symmetry in a trigonal superconductor
Giant intrinsic rectification and nonlinear Hall effect under time-reversal symmetry in a trigonal superconductor Open
Nonreciprocal or nonlinear responses in symmetry-broken systems are powerful probes of emergent properties in quantum materials, including superconductors, magnets, and topological materials. Recently, vortex matter has been recognized as …
View article: Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures
Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures Open
Material structures containing tetrahedral FeAs bonds, depending on their density and geometrical distribution, can host several competing quantum ground states ranging from superconductivity to ferromagnetism. Here we examine structures o…
View article: Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures
Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures Open
Material structures containing tetrahedral FeAs bonds, depending on their density and geometrical distribution, can host several competing quantum ground states ranging from superconductivity to ferromagnetism. Here we examine structures o…
View article: Symmetry Breaking and Nonlinear Electric Transport in van der Waals Nanostructures
Symmetry Breaking and Nonlinear Electric Transport in van der Waals Nanostructures Open
The recent development of artificially fabricated van der Waals nanostructures makes it possible to design and control the symmetry of solids and to find novel physical properties and related functionalities. A characteristic physical prop…
View article: Replication Data for: Gate-controlled BCS-BEC crossover in a two-dimensional superconductor
Replication Data for: Gate-controlled BCS-BEC crossover in a two-dimensional superconductor Open
Input files and brief instructions for QuantumEspresso. Replication Data for: Fig. 1-4, Fig. S1-S7, Fig. S8
View article: Proximity-mediated magnon-exciton coupling at a van der Waals heterointerface
Proximity-mediated magnon-exciton coupling at a van der Waals heterointerface Open
Coupling between heterogeneous physical systems holds great promises to leverage their individual assets. For example, low-dissipative spin ensembles are combined with well-controlled electric and phononic devices for spintronics, or with …